Viscous flow and crystallization behavior of tektite glasses

Details Viscous flow and crystallization behavior of tektite glasses Viscous flow and crystallization behavior of tektite glasses

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.5485k&link_type=abstract

Journal of Geophysical Research, vol. 85, Oct. 10, 1980, p. 5485-5489. NASA-NSF-supported research.

Physics

7

Crystallization, Glass, Tektites, Viscous Flow, Chemical Composition, Heat Transmission, Temperature Effects

Scientific paper

The variation of viscosity with temperature was determined in the 200-2000 K range for a Muong Nong tektite material. The viscosity at the liquidus temperature of 1320 C is 20,000 P; treatments between 900 and 1300 C do not result in significant crystallization in the natural sample except when the sample is heated in contact with a synthetic tektite composition. Two synthetic microtektite with lower SiO2 contents than the Muong Nong material were also examined; heat flow calculations were performed for 2.5 to 10 cm spheres of tektite when cooling by radiation.

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